Abstract: The invention relates to a refractory thixotropic self-hardening vibration compound on the basis of zirconium silicate having the following chemical composition (in % by mass);______________________________________ 20 to 30% SiO.sub.2 20 to 45% Al.sub.2 O.sub.3 0.7 to 1.4% TiO.sub.2 0.2 to 0.8% P.sub.2 O.sub.5 0 to 1.5% K.sub.2 O + Na.sub.2 O + LiO.sub.2 0 to 1.0% Fe.sub.2 O.sub.3 0 to 0.05% CaO residue ZrO.sub.

Abstract: The refractory block arrangement for a rotary slide valve closure for metal melt containers having a bottom discharge, which arrangement comprises a refractory top block; a refractory rotatable frustoconical discharge block having a discharge flow channel having a vertical central axis that coincides with the central axis of the flow channel of the top block, and an axis of rotation extending at an acute angle to the vertical central axis of the discharge flow channel and intersecting the vertical central axis at a point lying in a cross-sectional plane of the discharge opening; and further comprising a drivable annular entraining casing rotatably supported in the slide valve casing of the rotary slide valve closure for supporting the frustoconical discharge block.

Abstract: A rotary slide valve closure for metal melt containers having a bottom discharge wherein the rotary slide valve closure has a fixed refractory top block and a rotary refractory discharge block sealingly tight engaging the fixed refractory top block and including a discharge flow duct positionable coaxial with the flow duct of the fixed refractory top block. An assembly plate is attached to the bottom of a metal melt container. Joint means pivotally supports a slide valve casing on the assembly plate. The rotary slide valve closure also includes an annular entraining casing pivotally arranged in the slide valve casing for supporting the rotary refractory discharge block. The rotary discharge block has a substantially flat sealing and a sliding surface engaging the fixed refractory top block and a spherical portion extending below the sealing and sliding surface. The entraining casing has a spherical inner surface engaging the spherical portion of the rotary refractory discharge block.

Abstract: The invention relates to a thixotropic self-curing refractory material based on zirconium silicate, and a process and an apparatus for lining metallurgical vessels, in particluar ladles in steel plants, with this material which is compacted by means of a vibration method.

Abstract: The invention relates to an arrangement for actuating a slide-gate nozzle which is installed on the bottom of a casting ladle. This arrangement comprises a cylinder/piston unit which is operated by means of a pressure medium. Elements of a coupling are, in each case, assigned to the cylinder and to the stationary portion of the slide-gate, on the one hand, and to the piston rod and to the movable portion of the slide-gate of the slide-gate nozzle, on the other hand, these elements being in engagement when in the operating position. The invention embodies the combination of the following features, namely that the elements of the first coupling comprise a quarter-turn fastener, this coupling being assigned to the stationary portion of the slide-gate, and to the cylinder, and that the elements of the second coupling comprise a latching mechanism of the snap-in type, this coupling being assigned to the movable portion of the slide-gate, and to the piston rod.

Abstract: The invention relates to a slidable closure element for slide closures of metallurgical vessels, composed of a one-piece plate of heat resistant material which is engaged at its two opposite narrow edges by frame members that are drawn together by screws serving to tension them and hold them in contact with the edges of the plate.

Abstract: There is disclosed in a ceramic burner comprising a base, a crown disposed on an opposing end to said base and therebetween a housing defining a combustion chamber, a first conduit entering said housing and communicating therein with a gas chamber in turn communicating with a gas passage running longitudinally therethrough, a second conduit entering said housing and communicating therein with an air chamber in turn communicating with an air passage running therethrough, said gas passage and said air passage juxtaposed to one another, each having an elongated cross section, said gas passage and said air passage being vertically supported from one another, said gas passage and said air passage being in communication with said crown the improvement wherein between said gas passage and said air passage there is disposed at least one gas slot and at least one air slot extending from said base to said crown, said gas slot and said air slot being closed off from said gas passage, said air passage, said gas chamber a

Abstract: An improvement in a process for forming a refractory lining on the interior walls of the metallurgical vessel which interior walls are coaxial to the principal axis of the vessel wherein a refractory mass containing a binder is centrifugally slung onto the interior walls in a direction normal thereto while the vessel is at a standstill is disclosed. According to the invention, the refractory mass is initially shaped into balls prior to being centrifugally slung and the balls are centrifugally slung in rapid succession to form a mass jet. Also disclosed, is a device for so slinging a refractory mass on the walls of a vessel comprising a slinger head having a slinger wheel and a motor and at least one supply conduit for supplying refractory mass to be slung. The slinger wheel of the slinger head is disposed on one end of a shaft which shaft is extendable into a vessel, the slinger wheel being connected to an actuatable by a slinger motor.

Abstract: An improvement in a process for forming a refractory lining on the interior walls of the metallurgical vessel which interior walls are coaxial to the principal axis of the vessel wherein a refractory mass containing a binder is centrifugally slung onto the interior walls in a direction normal thereto while the vessel is at a standstill is disclosed. According to the invention, the refractory mass is initially shaped into balls prior to being centrifugally slung and the balls are centrifugally slung in rapid succession to form a mass jet. Also disclosed, is a device for so slinging a refractory mass on the walls of a vessel comprising a slinger head having a slinger wheel and a motor and at least one supply conduit for supplying refractory mass to be slung. The slinger wheel of the slinger head is disposed on one end of a shaft which shaft is extendable into a vessel, the slinger wheel being connected to an actuatable by a slinger motor.

Abstract: An improvement in a slide gate for a container holding molten metal comprising a slide housing and refractory bodies made of a refractory composition, which refractory bodies have been impregnated with carbon-containing media, the improvement residing in employing as the carbon-containing medium an oil containing less than 10% by weight pitch.

Abstract: A head or slide plate for a molten-metal slide gate is formed by a refractory plate having an opening and a refractory ring positioned in the opening, with a ring of tar between the peripheries of the opening and refractory ring and which is isolated from the plate surfaces excepting for a passage filled with a porous refractory and through which the vaporized tar migrates to one of the slide surfaces when the plate and ring are heated by contact with the molten metal.

Abstract: A slide gate nozzle for a slide gate carried by a closure frame which includes two independent arms pivotally connected with a casting vessel for slidably moving the slide gate with respect to the casting vessel and for moving the slide gate away from the vessel to facilitate changing of the ceramic plates. Rocker frames are pivotally connected with the arms and include rollers on which a guide rail rides in the sliding direction of the slide gate, and the swivelly connected rocker frame assures even pressure of the ceramic plates.

Abstract: A process for the production of a refractory lining within a tubular vessel which comprises disposing said tubular vessel so that the longitudinal axis running therethrough is horizontal, slinging a moist refractory mass onto a longitudinal or annular section of the interior wall of the tubular vessel and thereafter applying moist refractory mass to additional longitudinal or annular sections as the case may be. The process can be conducted either by rotating the vessel so as to expose successive annular sections and applying refractory mass to said sections from a fixed position or it can be performed by moving the source of refractory mass longitudinally to cover longitudinal sections and rotating the vessel only partially so as to bring the stream of refractory mass against a second longitudinal section. Devices to carry out these processes are disclosed including a slinger machine disposed for longitudinal movement within the vessel and means for rotating the vessel to the desired extent.

Abstract: A process for removing dust produced in the lining of casting ladles wherein a slinging mass is slung between the inner walls of the ladle and an opposing template whereby a free space is defined between the ladle wall and the template which free space contains dust which process involves sucking the dust in the free space from a point near the upper edge of the template into a region behind the template; an apparatus for performing such a process comprising a template, a suction conduit inside said template having an inlet and an outlet, the inlet being in fluid communication with particles disposed near the upper edge of said template, the suction conduit including filtering means for filtering out entrained particles from air sucked therethrough, the filtering means including means for collecting filtered particles, the outlet end of the suction conduit includes means for sucking air therethrough.

Abstract: An improvement in a horizontally disposed regenerator having a plurality of generally parallel courses of bricks separated by vertical spacers, each course of which runs generally horizontal, the improvement lying in that the bricks have a generally slab-like horizontal surface, and the vertical risers run generally longitudinal of said slab-like surfaces between courses of brick, the slab-like surface engaging the slab-like surface of an adjoining horizontally disposed brick, the vertical spaces engaging the slab-like surfaces by a tongue and groove connection.